I haven't paid much attention to webOS, but I heard it was trying to be 'web developer friendly' -- meaning 'web standards' like HTML 5 I thought.
I was pleasantly surprised to find the following :
Roll your own services with Node.js
This to me is very interesting and indicates HP (Palm) may have done webOS right.
Now Node.js seems to be getting a lot of warranted attention. This may be the excuse I need to get a (hopefully discounted) HP Touchpad.